feat(ui): add git version info display in header

- Display current branch/tag and commit hash in navbar center
- Show dirty working directory indicator with yellow badge
- Add automatic build info generation in Task workflow
- Include build timestamp and user information
- Style with responsive design (hidden on mobile)
- Add .gitignore entries for generated build artifacts

layouts/partials/version-info-script.html

@@ -0,0 +1,35 @@
+{{/* Inline JavaScript to add version info to navbar */}}
+{{ $buildInfo := .Site.Data.build_info }}
+{{ if $buildInfo }}
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+  // Find the navbar container
+  const navbarContainer = document.querySelector('.td-navbar .container-fluid');
+  if (!navbarContainer) return;
+  
+  // Create version info element
+  const versionDiv = document.createElement('div');
+  versionDiv.className = 'navbar-version-info d-none d-md-flex align-items-center mx-3';
+  versionDiv.style.flex = '1';
+  versionDiv.style.justifyContent = 'center';
+  
+  const versionText = {{ if $buildInfo.git_tag }}"{{ $buildInfo.git_tag }}"{{ else }}"{{ $buildInfo.git_branch }}"{{ end }};
+  const commitHash = "{{ $buildInfo.git_commit_short }}";
+  const isDirty = {{ $buildInfo.git_dirty }};
+  
+  versionDiv.innerHTML = `
+    <small class="text-light opacity-75">
+      <span class="fw-bold">${versionText}</span>
+      <span class="mx-1">@</span><code class="text-light bg-transparent border-0 p-0" style="font-size: 0.8rem;">${commitHash}</code>
+      ${isDirty ? '<span class="badge bg-warning text-dark ms-1 px-1" style="font-size: 0.6rem;">*</span>' : ''}
+    </small>
+  `;
+  
+  // Insert version info between brand and nav items
+  const navScroll = navbarContainer.querySelector('.td-navbar-nav-scroll');
+  if (navScroll) {
+    navbarContainer.insertBefore(versionDiv, navScroll);
+  }
+});
+</script>
+{{ end }}